What does this road sign inform drivers about?

• Drivers should prepare to make a sharp right turn.
• The road curves to the right ahead, and drivers should reduce their speed and proceed with caution.
  Explanation:

  "This sign informs drivers that the road curves to the right ahead. Drivers should reduce their speed and proceed with caution."
• The right lane ends ahead, and drivers must merge left.
• Right turns are not allowed at the upcoming intersection.